13129387552 has 24 divisors (see below), whose sum is σ = 26202575196. Its totient is φ = 6474765312.

The previous prime is 13129387549. The next prime is 13129387553. The reversal of 13129387552 is 25578392131.

It can be written as a sum of positive squares in 2 ways, for example, as 13124910096 + 4477456 = 114564^2 + 2116^2 .

It is a super-2 number, since 2×13129387552² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13129387553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2807893 + ... + 2812564.

Almost surely, 2^13129387552 is an apocalyptic number.

It is an amenable number.

13129387552 is a deficient number, since it is larger than the sum of its proper divisors (13073187644).

13129387552 is an equidigital number, since it uses as much as digits as its factorization.

13129387552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5620540 (or 5620532 counting only the distinct ones).

The product of its digits is 453600, while the sum is 46.

The spelling of 13129387552 in words is "thirteen billion, one hundred twenty-nine million, three hundred eighty-seven thousand, five hundred fifty-two".